Fastening-inserting machine



G. GODDU FASTENING INSERTING MACHINE Oct. 12

'Filed Sept. 27, 1923 GEORGE GODDU, OF WINCHESTER, MASSACHUSETTS, ASSIGNOR T T53 TED SHOE MACHINERY CORPORATION, OF PATERSON, NEVI JERSEY, A CORPORATON OF NEW JERSEY.

FASTENING-NSERTING MACHINE.

Application filed September 27, 1923. Serial No. 665,134.

' adjacent to the driver bar and a lifting block carried by the driver bar, the cam cooperating witli the lifting block to elevate the driver bar against the action of the sprinfY so that when the cam passes out of engagement with the lifting block the driver bar and driver will be forced downwardly by the spring to drive the nail or other fastening into the worlr.

It has been found that the driver bars of machines of this type frequently break, there being no ascertainable cause for the failure of the driver bar except that condition of fatigue commonly spoken of as crystalliz/lation7 resulting from the long continued series of shocks to which the driver bar has been subjected.

It is an object of the present invention to prolong the lives of the driver bars of such .machines by reducing, so far as possible, the shock to which the driver bars are subjected. l/Vith this in view, a feature of the invention comprises a resilient lifting block which is attached to the driver bar of the machine in place of the rigid block heretofore used, the resilient lifting bloclr being located in the path of movement of the lifting cam so that thc shock of the blow of the lifting cam upon the lifting block is cushioned and fatigue or crystallization of the driver bar is thereby avoided.

With the above and other objects and features in view, the invention will now be described in"connection with the accompanying drawings and pointed out in the claims.

In the drawings,

Fig. 1 is a front elevation, with certain parts in section of the head of a fastening' inserting machine `embodying the present in vention;

Fig. 2 1s a perspective view of the driver bar withr a novel lifting bloclr attached thereto and showing the relation of the latter to a wear plate carried by the head of the machine;4 and v F ig. 8 is a perspective'view of the resilient lifting block detached from the machine.

The invention is herein disclosed as em bodied in a taclrer of the type rmore fully shown in United States Letters Patent No.

910,147, granted January 19,1909, on an application of Frederick H. Perry. Since ma- 65 chilies of this type are fellknown in the art, it is believed that a very brief description of the general organization 1of the machine will suffice, and that it is not necessaryr to set forth in detail the construction thereof since'reference maybe had to said Letters Patent for that information. i

The illustrated machine is provided with a column 6 carrying a head 8 upon which is supported a reel 10 toy carry a coil of wire 12. Fastenings are cut from the wire 12 and fed tonozzle y14 of the machine by appropriate mechanism whichy may be and is illustrated as substantially vlike that disclosed in said Letters Patent No. 910,147.

The head 8 of the machine is provided with bearings for a cam shaft 16 operated and controlled in any suitable manner and carrying a camv18 provided with an elevated portion terminating in a toe 2O arranged to. cooperate with lifting block 22 carried by the driver bar 24 to the lower end ofV which is clamped the driver 26.' The upper end ofthe driver bar 24 is connected by a link 28 to one end of alever 29 to which is secured one end of a stiff torsion spring 80, theotlier end ofwhich' is anchored to head 8 of the machine. As cam 18 rotates, its toe 20 engages lifting block 22 and forces it upwardly thus elevating driver bar 24 and driver 2.6 and tensioning spring 30. When the elevated poi-tion of cam 18 passes beyond lifting block 22, the driver bar and driver are forced downwardly by spring 30 thus driving the fastening into the work.

It h as been found that the repeated shock to which the driver bar is subjected bvI this mode of operation induces in the driver bars that condition of fatigue commonly spoken of as crystallization, with the result that the driver bars break after they have been used for a period of time, and this breakage has not been overcome by the Aso cushioning effect provided by leather washers backed up by a collar 32 carried by driver bar 24 and co-operating at the downward extremity of the path of movement of the driver bar with a stop 34 car'- ried by the head of the machine.

In order to cushion the shock of the blows struck vby the toe 2O of lifting cam 18 when the toe contacts with the lifting block, I have made the latter of a resilient construction. As herein disclosed the lifting block comprises a heavy bow spring having` a U- shaped portion consisting of two arms 36,

38 (Figs. 2 and 3), arm 38 being extended beyond the extremity of arm 36, thickened at 40 and bent at right angles at 42'toprovide a downwardly extending portion 44. The thickened portion 40 of the lifting block is perforated at 46 so that it may be clamped to the driver bar as by nuts 48 (Fig. l). rThe bent portion 44 engages a fiat 510. .formed upon the driver bar 24 and also provides a wear surface having sliding engagement with a wear block 52 adj ustably mounted as by a bolt and slot connection 54 upon the head. of lthe machine. iVith this construction not only. is the shock of the lifting cam upon the lifting block cushioned so that fatigue of the driver bar is avoided but also the slack may be easily taken up as the contacting surfaces of the lifting block and the wear plate wear se that these parts of the machine may be kept in a smooth running conditiony and vibration avoided. This lifting block, moreover, is inexpensive to manufacture and may be replaced when necessary with a minimum of effort.

lVhile the invention has been disclosed hereinl as embodied in a machine of the type disclosed in said Letters Patent, No. 910,147, it should be understood that the invention isy in no wayV limited to a machine such as is shown in said Letters Patent since evidently it is. applicable also to other machines,

Having described the invention, what I claim as new and desire to secure by Letters Patent of the United States is zl.. A lifting block for fastening inserting machines comprising a stiff spring having a U-shaped portion with one of the arms of the U longer than the other and bent substantially at right angles to provide means for securing the block to the driver bar of a fastening inserting machine.

2. A lifting block for fastening inserting machines comprising a bow spring arranged to have one of its extremities secured to the driver bar of a fastening inserting` machine and to be engaged toward its other extremity by the lifting cam of the machine.

A lifting block for fastening inserting machines consisting of a stiff spring ar ranged to be secured to the driver bar of the .machine directly to receive the blows of the lifting cam of the machine.

4. A lifting block arranged to be secured to the driver bar of a fastening inserting` machine and to be engaged by the lifting cam of the machine te lift the driver bar, characterized by the fact that the block is of a resilient construction seas to cushion the blows of the lifting cam against the block. y

je, fastening inserting machine having, in combination, a driver bar, a lifting cani, a resilient lifting block attached to the driver bar and positioned in the path of movement of the lifting cam to cause the latter to elevate the driver bar, and a spring connected to the driver bar and compressed by the lifting thereof so as to force the driver bar eewn when the lifting)` cam passes from beneath the lifting block.

G. il fastening inserting machine having a driver bar, a lifting' cani, a spring lifting block attached to tlie driver bar and prejeeting into the path `of movement of the lifting cam to cansev the latter to lift the driver bar, means fer forcing thedriver bar down v-/hen the vcam passes eut of engagement with the lifting block, and an adjustable vic-ar plate engaging the lifting' block during thev reci procatien cf the driver bar.

in testiniiony whereof l haveI signed my naine to this specification.

GEURG'E GODDU. 

